Forty used Brown & Sharpe 11 collets for screw machines or lathes. Sizes range from 1/8 to about 3/4 (may be a couple of duplicates).Mostly for round stock, but a few hex and rectangular too. In decent condition - some minor rust and aging. All marked' B & S Mfg Co, Prov RI No 11. Some have sizes marked but not all of them. From stored stock at a machine shop -have not been used for at least 15 years! Lease ask all the questions you may need to clarify any details in the listing or photos. Any concerns will be addressed promptly and correctly. Thanks for looking and don't forget to check my feedback.